Question

Which of the following is the correct way to represent the equation 3x=9 in ax+by+c = 0 form?

(a) 3x = -0y + 9

(b) 3x + 0y = 9

(c) 3x + 0y – 9 = 0

(d) 3x + 0y = 9

This question was posed to me during an online interview.

My question is from Linear Equations in Two Variables topic in chapter Linear Equations in Two Variables of Mathematics – Class 9

Answer 1

The correct option is (c) 3x + 0y – 9 = 0

Explanation: In ax + by + c = 0, a, b and c are numbers and a, b≠0 while x and y are variables.

Given equation is 3x=9.

If we want it to represent in the ax+by+c=0 form, we can write 3x + 0y – 9 = 0 where a = 3, b = 0 and c = -9.